Struts2自定义拦截器，实现发表文章检查是否已登陆功能

来源：互联网发布：linux svn 分支编辑：程序博客网时间：2024/06/01 18:29

老师布置了个份作业：要求用Struts2实现定义一个拦截器，如果用户发表评论，就检查是否用户已经登陆，如果已经登陆，正常发表，如果没有登陆，则跳转到登陆页面。这个功能很简单，就当做复习拦截器吧。

jsp页面：

然后是action：

CommendAction代码如下：

package com.lin.action;import java.util.Map;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class CommentAction extends ActionSupport   {private String word ;public String getWord() {return word;}public void setWord(String word) {this.word = word;}public String execute(){ActionContext cx = ActionContext.getContext();cx.put("word",word);System.out.println("Comment is running");return "commend_SUCCESS";}}

LoginAction代码如下：

package com.lin.action;import java.util.Map;import com.lin.model.User;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport{private User user ;public User getUser() {return user;}public void setUser(User user) {this.user = user;}public String execute(){ActionContext ctx = null;ctx = ActionContext.getContext();Map<String,Object> session = ctx.getSession();if( "admin".equals(user.getUsername()) && "pass".equals(user.getPassword())){session.put("User",user);return "login_SUCCESS";}else{session.put("User", null);return "login_FALSE";}}}

CommentInterception代码如下：

package com.lin.interception;import java.util.Map;import com.lin.action.CommentAction;import com.lin.model.User;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;public class CommentInterception extends AbstractInterceptor{@Overridepublic String intercept(ActionInvocation invocation) throws Exception {CommentAction commentAction = (CommentAction) invocation.getAction();ActionContext ctx = null;ctx = ActionContext.getContext();Map<String,Object> session = ctx.getSession();User user = (User) session.get("User");if(user == null){return "commend_FALSE";}else{return invocation.invoke();}}}

Struts.xm代码如下：

<?xml version="1.0" encoding= "UTF-8" ?>  <!DOCTYPE struts PUBLIC     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"     "http://struts.apache.org/dtds/struts-2.0.dtd"> <struts>  <constant name="struts.devMode" value="true" />  <package name ="TestOne" extends="struts-default" namespace="/">  <interceptors><interceptor name="myinterceptor" class="com.lin.interception.CommentInterception"></interceptor></interceptors>  <action name="comment" class="com.lin.action.CommentAction"> <result name="commend_SUCCESS">/jsp/result/commend_SUCCESS.jsp</result> <result name="commend_FALSE">/jsp/login.jsp</result> <interceptor-ref name="defaultStack"></interceptor-ref> <interceptor-ref name="myinterceptor"></interceptor-ref> </action>  <action name="login" class="com.lin.action.LoginAction"> <result name="login_SUCCESS">/jsp/index.jsp</result> <result name="login_FALSE">/jsp/result/login_FALSE.jsp</result> </action>   </package> </struts>

User类代码如下：

package com.lin.model;public class User {private String username = null;private String password = null;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}

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